Fluid-operated banker



G. F. FLETCHER.

FLUID OPERATED BANKER. APPLICATION man MAR. 24, 1920.

Patented Jan. 4, 1921.

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. necessity UNIT E.

GILBERT IF. FLETCHER, 0F BANGOR, MAINE.

FLUID-OEERATED BANKER.

Specification of Letters Eatent.

Patented Jan. 4., 1921.

Application filed March 24, 1920. Serial No. 368,384.

To all whom it may concern Be it known that I, GILBERT F. Fnnronnn, a citizen of the United States, and resident of Bangor, in the county of Penobscot and State of Maine, have invented certain new and useful Improvements in Fluid-Operated Bankers, of which the following is a specification.

My invention relates to bankers, and more particularly to a banker of the fluid pressure type, which is provided with an adjustable table.

It is customary, in the stone-working trade, to provide a banker or support upon which the slab or stone or other material to be operated upon is placed, and thereafter to raise the same to the desired height so as to position it conveniently for the artisan.

It is ofttimes difficult to place a stone or slab oi large proportions upon the table or supporting portion of the banker, inasmuch as the same is bunglesome and diiiicult to handle. My invention contemplates pro viding a banker in which the table or supporting portion may be adjusted or tipped to a position whereby the slab or stone may be more conveniently mounted thereon.

By my structure I am enabled to move the stone or slab adjacent the banker with the supporting table tipped so as to receive the stone. I am thereby enabled to tip the slab or stone against the table, and by a further operation to move the stone and table to a horizontal position. When this is done I can, with my invention, secure this table in its horizontal position and thereafter adjust the banker to any desired height. in this manner I am enabled to dispense with the of lifting the slab or stone upon the supporting table of the banker.

Other objects will appear more fully hereinafter in the specification and in the drawings, in which- Figure 1 is a side elevation of my improved banker, showing in dotted lines the table in one of its adjusted positions;

Fig. 2 is an elevation similar to Fig. 1, but taken from another angle; and

Fig. 3 is a fragmentary, perspective view of the table portion of my banker.

In the drawings, numeral 1 indicates a floor or other support upon which my improved banker is adapted to rest. 2 represents a piston cylinder, in which piston head 3 is adapted to travel. The piston head 3 has rigidly secured thereto a piston rod 4:, upon which is supported the adjustable table 5.

The means for attaching the table 5 to the piston rod 4 will now be described. The upper end of the piston rod 4 is squared and flattened, as shown at 6. A circular plate 7 is secured, in any suitable manner, to the table 5, preferably by bolt and nut connections 8. This plate 7 has formed integrally thereon ears 9, apertured to receive bolts 10 which pass through the fiattened end 6 oi the piston rod 1, and through the ears 9, to provide a pivotal connection between the plate 7 and the end of the pisrod 1. This construction is clearly shown in Fig. 3 of the drawings.

By providing this pivotally mounted plate 7 and securing thereto the table 5, it is clearly evident that the table may at all times be tilted, as shown in dotted lines in Fig. 1. This arrangement does not, however, interfere with the raising or lowering of the table by the piston means hereinbefore described.

The plate is also provided with a pair ofears 11 formed integrally thereto and adjacent its edge. An arcuate arm 12 is pivotally secured between these ears 11 by a bolt and nut connection 13, as clearly shown in Fig. 3. This connection 13 allows for a pivotal movement of the arcuate arm 12.

In order to secure the arcuate arm, and thereby the plate 5, in any of its adjusted positions, I provide a split collar 14, clamped upon the upper end of the piston rod 4 by means of bolt and nut connections 15. One side of this split ring is extended, as indicated at 16 in Fig. 3, and apertured, as at 17, to provide a guideway for the arcuate arm 12. One section of the extended side of the split ring is bent to form an angular lip 18, provided with a set screw 19. The arcuate arm 12 is provided adjacent its free end with an opening 20, for

a purpose to be hereinafter more fully described.

In order to secure the piston cylinder 2 to the floor or other support, I provide the same with a supporting flange 21, having formed thereon a boss or hearing ridge 22. A split ring 23 encircles the piston rod 4 and is clamped upon the same by means of bolt and nut connections 24. This clamping ring is adapted to rest upon the bearing ridge 22. When the supporting table has on to the piston rod 4, allowing it to bear upon the bearing ridge 22 and making it unnecessary to depend upon the fluid pressure means employed in raising the table to maintain'it in its raised position.

It is obvious, of course, that when it is desired to raise the table 5, water or other fluid pressure means may be admitted to the cylinder 2 by means of pipe 25 under the pistonhead 3, which will cause the same to move upwardly and thereby raise the table.

As .hereinbefore described, the table may then be maintained in its position by means of the split clamping ring 23, and the Weight will be borne by ring 23 and bearing ridge 22.

I will now describe the operation of my adjustable table. When the table is in its lowermost position, as indicated in Figs. 1 and 2, and it is desired to mount thereon a slab or stone, the set screw 19 is unscrewed, withdrawing it from the aperture 20 of the accuate arm 12. The table may then be swung to the position indicated in dotted lines in Fig. 1, by reason of its pivotal connection with the piston rod 4. The set screw can be adjusted at this time to impinge against the arcuate arm 12 to hold the table in this position. In this position the slab or stone is moved adjacent the table and then tilted to rest upon the table. A further movement in the same direction of the stone will tend to move the table bearing the stone to a horizontal position, as indicated in full lines in Fig. 1, it being understood, of course, that the arcuate arm during this operation slides freely through the aperture 17 of the split ring 14. lVhen the table is in this horizontal position, the set screw 19 is adjusted to enter the aperture 20 and thereby secure thetable 5 in its horizontal position, and also support the slab or stone in the position to be operated upon by the artisan.

With the stone in position upon the table 5, fluid pressure may thereafter be admitted under the piston head 3 and the table raised to the desired height and secured by means of the split ring 23.

It should be noted that I have provided a simple but durable and efficient structure. Various sizes of table 5 may be secured to the plate 7 without detriment to the efiiciency of my invention. The split ring 14, which, coperating with the arcuate arm 12, provides the securing medium for the plate 7, is formed in such mamier that it may be readily removed, should this at any time be desirable. 7

Various changes and modifications may be resorted to without departing from the spirit and scope of my invention, and I specifically reserve this right. been raised, this ring may then be clamped w Having thus described my invention, what I desire to claim is 1. A banker, comprising a piston "cylinder, a piston head and a piston rod, a table and means for supporting said table upon said piston rod comprising a plate provided with a pair of cars, said ears being adapted to straddle the end of the piston rod to pivotally connect said table thereto, another ear formed at the periphery of said plate, a001- lar clamped upon said piston rod and an arcuate arm pivoted to said last-mentioned ear and passing through said collar, substantially asdescribed.

2. A device of the class described comprising a cylinder, a flange formed at the top of said cylinder, a piston head, a piston rod and a plate pivotally supported on the end of said piston rod, a table secured to said plate, a clamping ring encircling said piston rod and bearing upon a ridge formed on said cylinder flange, said clamping ring adapted to support said table in its adjusted positions, substantially as described.

In a device of the class described, a cylinder, a piston head and a piston rod, a

end of said piston rod, a table secured to said plate,a depending ear formed. on the periphery of said plate, a collar clamped upon said piston rod, saidcollar being provided with an aperture, an arcuate arm having one end pivoted to said depending ear and having its other end passing through said aperture, and means cooperating with said arcuate arm for securing said table in its adjusted positions. i

4. In a device of the class described, a cylinder, a piston rod provided with a piston head and a table pivotally supported upon the other end of said piston rod, said cylinder and piston providing means for raising and lowering'said table, an arcuate arm pivoted to said table, a collar formed in two pieces clamped upon said piston'rod, said collar being formed with an'ex tension, said extension being provided with an aperture, one section of said collar being bent at right angles to said projection, a set screw extending through said bent'portion, said areuate arm being adapted to pass through the aperture formed in the collar and cooperating with said set screw to retain said table in its adjusted positions, substantially as described.

5. Abanker, comprising a piston cylinder, a piston head and a piston rod, a table, a plate provided with a pair of ears secured to the under side of said table, means for pivotally connecting said plate to the upper end of said piston rod an arcuate arm pivotally connected peripherally of said plate, said table being angularly adjustable, and means cooperating with said arcuate arm for securing said table in its adjusted positions, as and for the purpose set forth.

GILBERT F. FLETCHER. 

